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Dont know what is wrong?
- Thread starter CupraTgirl
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traumapat said:
Hhmm so the fact its pulling back when its warmed up doesnt make sense if that theory is correct?
Yeah your right! If the turbo was gone or the turbo seals were gone it would be showing other signs and it isnt, i think they are being a bit drastic checking that to be honest
I have had it put on VAG COM SOOOOOOOOOOOOO many times and the same fault code comes up
Charge Pressure Control - Positive Deviation
When it was on diagnostics at SEAT i went into their workshop to speak to the Mechanic working on the car and it looked like there was something up on their screen and he did say there was something wrong with the boost/pressure
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m0rk said:
They just said the Mechanic was doing a 'process of elimination' and that it wasnt my MAF which i would have got done free on Warranty
IIRC someone once told me my actuator was wound in a bit?
Saul said:
Forgive my innocence but this is where my knowledge stops! What does that do? What symptoms would it pull up?
Yeah i ran it for about 3000 miles but am back with the standard airbox now
CupraTgirl said:They just said the Mechanic was doing a 'process of elimination' and that it wasnt my MAF which i would have got done free on Warranty
IIRC someone once told me my actuator was wound in a bit?
that could well have something to do with your problem, i take it you bought it like that and havent adjusted it?
If your actuator is wond in too much - it will log the fault as you describe (overboost)
It won't sort the irratic idle - but you're half way there
It won't sort the irratic idle - but you're half way there
Saul said:
No i havent done anything to my engine like that at all, everything is standard apart from the Dump Valve
Surely that would have caused a problem from when i got the car? I was told the fault that was coming up meant it was overboosting?
Until a month ago my car was boosting 100% right through to 6000RPM so could that be something that just goes?
traumapat said:actuator? sorry but what where and how? what is it
IIRC it is like a little device like screw thing with two nuts on it, it tells the turbo how much boost there is or something and the more its wound in the more boost will be requested? It sits by the turbo
Dont quote me on this though as i may be wrong
CupraTgirl said:IIRC it is like a little device like screw thing with two nuts on it, it tells the turbo how much boost there is or something and the more its wound in the more boost will be requested? It sits by the turbo
Dont quote me on this though as i may be wrong[/QUOTE
ta
actuator is on the side of your turbo, its a spring that compesses under pressure to make the turbo give the correct amount of boost basically
but because of all the electronic control in 1.8Ts, its not a great idea to adjust it manually...on older mechanical engines like rsturbos, its a cheap way of upping the boost instead of remapping
but because of all the electronic control in 1.8Ts, its not a great idea to adjust it manually...on older mechanical engines like rsturbos, its a cheap way of upping the boost instead of remapping
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what essentially "Charge Pressure Control - Positive Deviation" means is the ECU is asking a level of boost, e.g 0.5 bar and its seeing 0.65 bar, this is obviously postively deviating from the request.
I used to get "Charge Pressure Control - Negative Deviation" on my old remapped Ibiza which caused limp mode quite annoyingly towards the redline in 4th and is obviously the reverse of the above.
In laymans terms an actuator is connected to a small valve which is essentially a bypass and allows some exhaust gases to pass straight through the turbine to the exhaust without being used to compress the air and therefore controlling boost levels. This is controlled by the ECU via the N75 valve.
If someone has been messing with the actuator position this may cause problems with positive deviation but I was under the impression that the ECU is a clever piece of kit and would soon re-adjust itself to count the new position as normal position.
Good luck
I used to get "Charge Pressure Control - Negative Deviation" on my old remapped Ibiza which caused limp mode quite annoyingly towards the redline in 4th and is obviously the reverse of the above.
In laymans terms an actuator is connected to a small valve which is essentially a bypass and allows some exhaust gases to pass straight through the turbine to the exhaust without being used to compress the air and therefore controlling boost levels. This is controlled by the ECU via the N75 valve.
If someone has been messing with the actuator position this may cause problems with positive deviation but I was under the impression that the ECU is a clever piece of kit and would soon re-adjust itself to count the new position as normal position.
Good luck
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Cupra_Jeff said:
Thats what i thought the ECU would do too and it has been running like a dream until a month ago (when the hoses were changed)
Oh dear its such a mess
Cupra_Jeff said:
Yeah although i have the standard ones on there now and they all seem to be very secure so im wondering if there is a split one somewhere, i really dont know
Doesnt matter how many times you run the scan for fault codes it doesnt give us an idea to what the car is actually doing when running.
Heres what you do...
Fill the tank.
Get someone with vag com.
Log 114 115 118 020 002 under load... ie 4th gear 2000rpm > 6500+
Then post up the results.
Heres what you do...
Fill the tank.
Get someone with vag com.
Log 114 115 118 020 002 under load... ie 4th gear 2000rpm > 6500+
Then post up the results.
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